TRAVERSE CITY, Mich. (AP) — Michigan Gov. Gretchen Whitmer criticized Enbridge Inc. on Wednesday for what she described as the company's refusal to make an airtight pledge to pay for damages caused by a potential oil spill from its pipeline beneath a Great Lakes channel.

The Democratic governor's administration is pressuring the Canadian pipeline company for an explicit acknowledgment of financial responsibility for any release from its Line 5 into the Straits of Mackinac. Enbridge insists it already made such an assurance under a 2018 agreement with former Republican Gov. Rick Snyder to construct an underground pipeline tunnel beneath the straits.

“I’m shocked at Enbridge Inc.’s refusal so far to sign a written agreement promising to cover the costs of an oil spill in the Great Lakes if this unthinkable event were to happen,” Whitmer said in a statement.

“When I was a kid, my parents taught me: ‘You break it, you pay for it.’ It seems that’s the bare minimum Enbridge owes every Michigander so long as the company continues to pump crude oil through the Straits of Mackinac.”

Mike Koby, president of U.S. operations for Enbridge Energy LP, said the company had repeatedly made clear its acceptance of financial liability and was eager to discuss the matter with state officials.

“The Governor’s parents had it right," Koby said in a letter to Dan Eichenger, director of the state Department of Natural Resources. “We agree completely.”

Line 5 carries oil and liquids used in propane from Superior, Wisconsin, to Sarnia, Ontario. A nearly 4-mile-long (6.4-kilometers-long) segment, laid in 1953 beneath the Straits of Mackinac, is divided into two pipes.

The straits connects Lake Huron and Lake Michigan. It is a popular tourist draw and has cultural and economic importance to native tribes that operate commercial fishing vessels in the area.

The state is asking Enbridge to carry $900 million of liability insurance and have about $1.88 billion in additional assets available for a worst-case rupture in the straits. Enbridge says it's doing so under the 2018 tunnel agreement with Snyder.

But that deal was signed by Enbridge subsidiaries — not Enbridge Inc., their parent company based in Calgary, Alberta.

The disagreement centers on whether the parent company is legally bound by the deal — or by terms of a 1953 easement the state granted to put the dual pipelines in the straits.

Based on a contractor's analysis, the state contends Enbridge Inc. is off the hook and should make an explicit commitment in writing. Eichenger said the analyst also had concluded that Enbridge subsidiaries weren't capable of meeting the financial obligations.

Koby disagreed on both points.

“The Enbridge entity that has signed the agreements with the state of Michigan has repeatedly demonstrated it has the financial strength alone to satisfy the financial assurances in the agreement,” his letter said. “In addition, Enbridge Inc. will take full responsibility for the clean-up of any incident in Michigan or anywhere along our pipeline system.”

Under the U.S. Oil Pollution Act, the owner of Line 5 “would be obligated as a responsible party to assume the cost of any cleanup,” Koby said.

Environmental groups that have long pushed to shut down the pipeline said the financial dispute should be the final straw.

“If the governor now fails to begin the legal process of decommissioning Line 5 she will be responsible for the financial consequences of any Line 5 rupture on her watch,” said Sean McBrearty, coordinator of Oil & Water Don't Mix.

A state judge ordered a temporary Line 5 shutdown last month after Enbridge reported damage to a steel anchor holding a section of one pipe in place. The judge later allowed oil to resume flowing through the other underwater pipe.